anastomat

Abstract

The present application relates to a kind of anastomat.The anastomat includes shell, end effector, transmission, drive assembly, unlocking mechanism and back-off mechanism;Shell is provided with the opening for operating back-off mechanism, and cover plate covering the opening;Transmission includes first transmission part;Drive assembly includes linkage and drive source, linkage has transmission position and disengagement position, when linkage is in transmission position, linkage is connected with first transmission part, and is connected with drive source, when linkage is in disengagement position, linkage is disconnected with first transmission part;Unlocking mechanism includes unlocking piece with cover plate transmission connection, by operating cover plate, unlocking piece can be controlled to move between first position and second position;When unlocking piece moves from first position to second position, drive linkage is switched from transmission position to disengagement position.By operating cover plate, the interruption of power transmission of unlocking piece can be realized, reduce the operation step, improve the transmission back-off efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to staplers. Background Technology

[0002] Electric staplers combine a DC motor, circuit board, and mechanical components to achieve all the functions of a laparoscopic stapler under electric control. Their simple operation and core advantage of reducing accidental tissue damage caused by human error during surgery have been widely recognized in clinical practice. However, the motor, as the primary drive unit, is prone to malfunctions, including those occurring under special circumstances, which can lead to the jaws failing to open and release the gripped tissue. When a malfunction occurs during use, the stapler jaws may be clamping tissue. In this case, the transmission mechanism connected to the jaws needs to be retracted to allow the blades to retract and the jaws to open and release the tissue. However, current electric staplers typically require opening the cover to begin operation. The power is first cut off by the trigger, followed by a short reciprocating motion to retract the transmission mechanism. This process results in low retraction efficiency, affecting the speed and effectiveness of forced retraction during surgery. Summary of the Invention

[0003] Therefore, it is necessary to provide a new type of stapler that addresses the technical problem that current electric staplers typically require opening the cover on the outer casing to begin operation. The first step involves cutting off the power by pressing the trigger, followed by a short reciprocating motion of the trigger to retract the transmission mechanism. This process results in low retraction efficiency and affects the speed and effectiveness of forced retraction during surgery.

[0004] A stapler includes a housing, an end effector connected to the housing, and a transmission component, a drive assembly, an unlocking mechanism, and a retraction mechanism disposed within the housing;

[0005] The housing is provided with an opening for operating the retraction mechanism and a cover plate that at least partially covers the opening; the end effector includes a movable cutting member for cutting tissue; the transmission member is movable relative to the housing, the transmission member is operably connected to the cutting member, and the transmission member includes a first transmission part and a second transmission part;

[0006] The drive assembly includes a linkage and a drive source. The linkage has a transmission position and a disengagement position. When the linkage is in the transmission position, the linkage is driven to the first transmission part and the drive source. When the linkage is in the disengagement position, the linkage is disengaged from the first transmission part.

[0007] The unlocking mechanism includes an unlocking member that is movable between a first position and a second position, and is tractively connected to the cover plate. By operating the cover plate, the movement of the unlocking member between the first position and the second position can be controlled. The unlocking member is tractively connected to the linkage member. When the unlocking member moves from the first position to the second position, it drives the linkage member to switch from the tractive position to the disengaged position. The retraction mechanism is operably tractively connected to the second transmission part to drive the transmission member to move along a preset direction.

[0008] In one embodiment, the cover plate is rotatable relative to the housing, and the unlocking mechanism further includes a connector, through which the cover plate is kinetically connected to the unlocking member; when the cover plate is configured to rotate relative to the housing to open relative to the opening, the unlocking member is kinetically controlled to move from the first position to the second position via the connector.

[0009] In one embodiment, the connector is a link, one end of which is rotatably connected to the unlocking member and the other end is rotatably connected to the cover plate. The rotation axis of the cover plate relative to the housing does not coincide with the rotation axis of the unlocking member relative to the link.

[0010] In one embodiment, the cover plate is rotatable relative to the housing, one of the unlocking member and the cover plate is provided with a protrusion, and the other is provided with a groove. The protrusion is received in the groove and is slidable relative to the groove. When the cover plate is configured to rotate relative to the housing to open relative to the opening, the unlocking member is controlled to move between the first position and the second position.

[0011] In one embodiment, the unlocking element is a cam or a slider.

[0012] In one embodiment, the drive assembly further includes an elastic element for applying a thrust to the linkage to drive the linkage to reset.

[0013] In one embodiment, the unlocking element is a drive wheel, and the drive wheel has a mounting groove on its circumferential wall. The mounting groove includes a first groove segment and a second groove segment extending circumferentially along the drive wheel. The distances of the first groove segment and the second groove segment relative to an axial end face of the drive wheel are not equal.

[0014] The drive assembly further includes a rotating shaft passing through the linkage member, the rotating shaft passing through the mounting groove and slidably connected to the mounting groove;

[0015] When the drive wheel moves between the first position and the second position, the rotating shaft moves within the first groove and the second groove, thereby driving the linkage to move along the axial direction of the drive wheel, so as to switch the linkage between the transmission position and the disengagement position.

[0016] In one embodiment, the retraction mechanism includes a pawl and a trigger, the trigger being rotatable relative to the housing, the pawl being mounted on the trigger, the pawl being operably abutting against the second transmission unit, and the trigger driving the pawl to drive the transmission member to move in a preset direction.

[0017] In one embodiment, the retraction mechanism includes a drive rod and a drive gear. The drive gear is threadedly connected to the drive rod and has a first engagement position and a second engagement position. By operating the drive rod to rotate around its own axis, the drive gear can be driven to switch from the first engagement position to the second engagement position, so that the drive gear meshes with the second transmission part, thereby driving the transmission member to move along a preset direction.

[0018] In one embodiment, the transmission component further includes a second transmission part, and the retraction mechanism includes a retraction wheel and a connecting member. The connecting member is disposed around the outer periphery of the retraction wheel, and the two ends of the connecting member are respectively connected to the two ends of the transmission component. By operating the retraction wheel to rotate around its own axis, the connecting member can be driven to move the transmission component along a preset direction.

[0019] The present invention also provides an anastomosis device that can solve at least one of the above-mentioned technical problems.

[0020] A stapler includes a housing, an end effector connected to the housing, and a transmission component, a drive assembly, an unlocking mechanism, and a retraction mechanism disposed within the housing;

[0021] The end effector includes a movable cutting member for cutting tissue; the transmission member is movable relative to the housing, the transmission member is operably connected to the cutting member, and the transmission member includes a first transmission portion and a second transmission portion;

[0022] The drive assembly includes a linkage and a drive source. The linkage has a transmission position and a disengagement position. When the linkage is in the transmission position, the linkage is driven to the first transmission part and the drive source. When the linkage is in the disengagement position, the linkage is disengaged from the first transmission part.

[0023] The unlocking mechanism includes an unlocking drive and an unlocking member. The unlocking drive is movable relative to the housing, and the unlocking member is movable between a first position and a second position. The unlocking member is tractively connected to the unlocking drive, and the unlocking member can be controlled to move between the first position and the second position by operating the unlocking drive. The unlocking member is tractively connected to the linkage, and when the unlocking member moves from the first position to the second position, it drives the linkage to switch from the tractive position to the disengaged position. The retraction mechanism is operably tractively connected to the second transmission part to drive the transmission member to move along a preset direction.

[0024] In one embodiment, the unlocking actuator is rotatable or movable relative to the housing, and the unlocking actuator includes a cam or a slider.

[0025] In one embodiment, the drive assembly further includes an elastic element for applying a thrust to the linkage to drive the linkage to reset.

[0026] In one embodiment, the unlocking drive is rotatable relative to the housing. The unlocking drive is a drive wheel. The circumferential wall of the drive wheel is provided with a mounting groove. The mounting groove includes a first groove segment and a second groove segment extending circumferentially along the drive wheel. The distances of the first groove segment and the second groove segment relative to an axial end face of the drive wheel are not equal.

[0027] The drive assembly further includes a rotating shaft passing through the linkage member, the rotating shaft passing through the mounting groove and slidably connected to the mounting groove;

[0028] When the drive wheel moves between the first position and the second position, the rotating shaft moves within the first groove and the second groove, thereby driving the linkage to move along the axial direction of the drive wheel, so as to switch the linkage between the transmission position and the disengagement position.

[0029] In one embodiment, the retraction mechanism includes a pawl and a trigger, the trigger being rotatable relative to the housing, the pawl being mounted on the trigger, the pawl being operably abutting against the second transmission unit, and the trigger driving the pawl to drive the transmission member to move in a preset direction.

[0030] In one embodiment, the retraction mechanism includes a drive rod and a drive gear. The drive gear is threadedly connected to the drive rod and has a first engagement position and a second engagement position. By operating the drive rod to rotate around its own axis, the drive gear can be driven to switch from the first engagement position to the second engagement position, so that the drive gear meshes with the second transmission part, thereby driving the transmission member to move along a preset direction.

[0031] In one embodiment, the retraction mechanism includes a retraction wheel and an adapter. The adapter is disposed around the outer periphery of the retraction wheel, and both ends of the adapter are respectively connected to the two ends of the transmission member. By operating the retraction wheel to rotate around its own axis, the adapter can be driven to move the transmission member along a preset direction.

[0032] Beneficial effects:

[0033] The anastomosis device provided in this embodiment of the invention includes a housing, an end effector connected to the housing, and a transmission member, a drive assembly, an unlocking mechanism, and a retraction mechanism disposed within the housing. The housing has an opening for operating the retraction mechanism and a cover plate that at least partially covers the opening. The end effector includes a movable cutting member for cutting tissue. The transmission member is movable relative to the housing and is operably connected to the cutting member. The transmission member includes a first transmission part and a second transmission part. The drive assembly includes a linkage member and a drive source. The linkage member has a transmission position and a disengagement position. When the linkage member is in the transmission position, the linkage... The linkage is driven by the first transmission unit and the drive source. When the linkage is in the disengaged position, the linkage is disengaged from the first transmission unit. The unlocking mechanism includes an unlocking member that can move between a first position and a second position. The unlocking member is driven by the cover plate, and the movement of the unlocking member between the first and second positions can be controlled by operating the cover plate. The unlocking member is driven by the linkage. When the unlocking member moves from the first position to the second position, it drives the linkage to switch from the transmission position to the disengaged position. The retraction mechanism is operably driven by the second transmission unit to drive the transmission member to move in a preset direction. In this application, the unlocking component is connected to the cover plate via a transmission mechanism. When the cover plate is operated, the unlocking component can be driven to move between the first and second positions. The unlocking component is also connected to the linkage component via a transmission mechanism. When the unlocking component moves from the first position to the second position, it drives the linkage component to switch from the transmission position to the disengagement position. Then, by operating the retraction mechanism, the retraction mechanism is connected to the second transmission unit via a transmission mechanism, which can drive the transmission component to move in a preset direction. In other words, in this application, the power transmission of the unlocking component can be interrupted by operating the cover plate, reducing the number of operation steps and improving the retraction efficiency of the transmission component.

[0034] The present invention also provides a stapler, including a housing, an end effector connected to the housing, and a transmission member, a drive assembly, an unlocking mechanism, and a retraction mechanism disposed within the housing; the end effector includes a movable cutting member for cutting tissue; the transmission member is movable relative to the housing, the transmission member is operably connected to the cutting member, and the transmission member includes a first transmission part and a second transmission part; the drive assembly includes a linkage member and a drive source, the linkage member has a transmission position and a disengagement position, when the linkage member is in the transmission position, the linkage member is drively connected to the first transmission part and to the drive source, and when the linkage member is in the disengagement position... When in the open position, the linkage is disengaged from the first transmission part; the unlocking mechanism includes an unlocking drive and an unlocking member. The unlocking drive is movable relative to the housing, and the unlocking member is movable between a first position and a second position. The unlocking member is tractively connected to the unlocking drive, and the movement of the unlocking member between the first and second positions can be controlled by operating the unlocking drive; the unlocking member is tractively connected to the linkage, and when the unlocking member moves from the first position to the second position, it drives the linkage to switch from the tractive position to the disengaged position; the retraction mechanism is operably tractively connected to the second transmission part to drive the transmission member to move along a preset direction. This retraction mechanism can achieve at least one of the above-mentioned technical effects. Attached Figure Description

[0035] Figure 1 This is a first internal schematic diagram of a stapler provided in an embodiment of the present invention.

[0036] Figure 2 This is a schematic diagram of a stapler provided in an embodiment of the present invention.

[0037] Figure 3 This is a front view of the linkage component in the transmission position of a stapler provided in an embodiment of the present invention.

[0038] Figure 4 This is a first front view of the anastomosis device provided in an embodiment of the present invention, showing the linkage in the disengaged position.

[0039] Figure 5 This is a front view of the anastomosis device provided in an embodiment of the present invention, in which the rotation axis of the cover plate and the unlocking component coincide.

[0040] Figure 6 This is a second front view of the anastomosis device provided in an embodiment of the present invention, showing the linkage in the disengaged position.

[0041] Figure 7 This is a simplified diagram showing the cooperation between the cover plate, connecting rod, and unlocking component in a stapler provided according to an embodiment of the present invention.

[0042] Figure 8 A simplified diagram showing the cooperation between the cover plate and the unlocking mechanism in a stapler according to another embodiment of the present invention.

[0043] Figure 9 This is a schematic diagram of the unlocking element in a stapler provided in another embodiment of the present invention.

[0044] Figure 10 This is a schematic diagram of the engagement of the unlocking component and the linkage component in a stapler provided in another embodiment of the present invention.

[0045] Figure 11 This is a second internal schematic diagram of a stapler provided in an embodiment of the present invention.

[0046] Figure 12 This is a third internal schematic diagram of a stapler provided in an embodiment of the present invention.

[0047] Figure 13 This is a schematic diagram showing the overlap of the rotation axes of the cover plate, unlocking component, and trigger in a stapler provided according to an embodiment of the present invention.

[0048] Figure 14 This is a partial cross-sectional view of the pawl and the second transmission part in the anastomosis device provided in an embodiment of the present invention.

[0049] Figure 15 This is a schematic diagram of the pawl in a stapler provided in an embodiment of the present invention.

[0050] Figure 16 This is a schematic diagram of the retraction mechanism in a stapler provided in another embodiment of the present invention.

[0051] Figure 17 This is a schematic diagram of the retraction mechanism in a stapler provided in another embodiment of the present invention.

[0052] Figure 18 This is a schematic diagram of the anastomosis device with the cover plate open relative to the housing, provided in another embodiment of the present invention.

[0053] Figure 19 This is a partial schematic diagram of the interior of the stapler provided in another embodiment of the present invention.

[0054] Icon labels:

[0055] 100 - Transmission component; 110 - First transmission part; 120 - Second transmission part; 200 - Drive assembly; 210 - Linkage component; 220 - Drive source; 230 - Drive gear; 240 - Elastic component; 250 - Rotating shaft; 300 - Unlocking mechanism; 310 - Unlocking component; 311 - Second rotation axis; 312 - Protrusion; 313 - Unlocking drive component; 320 - Retraction mechanism; 321 - Trigger; 322 - Pawl; 323 - Base; 324 - Interlocking block; 325 - Limiting platform; 326 - Claw tip; 330 - Connecting rod; 331- Fourth rotation axis; 340- Mounting slot; 341- First slot segment; 342- Second slot segment; 350- Drive rod; 360- Drive gear; 370- Retractor wheel; 380- Adapter; 400- Frame; 500- Housing; 520- Cover plate; 521- First rotation axis; 522- Third rotation axis; 523- Slide groove; 530- First connecting line; 540- Second connecting line; 550- Third connecting line; 560- Fourth connecting line; 600- End actuator; 610- Cutting component. Detailed Implementation

[0056] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0062] See Figure 1 and Figure 2 , Figure 1 This is a first internal schematic diagram of a stapler provided in an embodiment of the present invention; Figure 2This is a schematic diagram of a stapler provided according to an embodiment of the present invention. The stapler provided in one embodiment of the present invention includes a housing 500, an end effector 600 connected to the housing 500, and a transmission member 100, a drive assembly 200, an unlocking mechanism 300, and a retraction mechanism 320 disposed within the housing 500. The housing 500 has an opening for operating the retraction mechanism 320 and a cover plate 520 that at least partially covers the opening. The end effector 600 includes a movable cutting member 610 for cutting tissue. The transmission member 100 is movable relative to the housing 500, and is operably connected to the cutting member 610. The transmission member 100 includes a first transmission part 110 and a second transmission part 120. The drive assembly 200 includes a linkage member 210 and a drive source 220. The linkage member 210 has a transmission position and a disengagement position. When the linkage member 210 is in a transmission position... In the transmission position, the linkage 210 is connected to the first transmission part 110 and the drive source 220. When the linkage 210 is in the disengaged position, the linkage 210 is disengaged from the first transmission part 110. The unlocking mechanism 300 includes an unlocking member 310, which can move between a first position and a second position. The unlocking member 310 is connected to the cover plate 520, and the movement of the unlocking member 310 between the first position and the second position can be controlled by operating the cover plate 520. The unlocking member 310 is connected to the linkage 210. When the unlocking member 310 moves from the first position to the second position, the linkage 210 is driven to switch from the transmission position to the disengaged position. The retraction mechanism 320 is operably connected to the second transmission part 120 to drive the transmission member 100 to move in a preset direction.

[0063] Specifically, in this application, the unlocking member 310 is connected to the cover plate 520 via a transmission connection, so that when the cover plate 520 is operated, the unlocking member 310 can be driven to move between the first position and the second position. The unlocking member 310 is also connected to the linkage member 210 via a transmission connection. When the unlocking member 310 moves from the first position to the second position, it drives the linkage member 210 to switch from the transmission position to the disengagement position. Then, by operating the retraction mechanism 320, the retraction mechanism 320 is connected to the second transmission part 120 via a transmission connection, which can drive the transmission member 100 to move in a preset direction. That is, in this application, the power transmission of the unlocking member 310 can be interrupted by operating the cover plate 520. Compared with the prior art, which requires opening the cover plate 520 on the outer shell before starting the power cut-off operation, this reduces the operation steps and improves the retraction efficiency of the transmission member 100.

[0064] When the linkage 210 is in the transmission position, it is connected to the first transmission part 110. Driven by the drive source 220, the linkage 210 drives the transmission part 100 to move, thereby realizing the cutting operation of the component 610. When the linkage 210 is in the disengaged position, it is disengaged from the first transmission part 110, and the retraction mechanism 320 can be connected to the transmission part 100. This reduces the interference of the drive component 200 on the transmission part 100 when the retraction mechanism 320 drives the transmission part 100 to move in a preset direction, thus improving the reliability of the retraction mechanism 320.

[0065] Furthermore, the linkage 210 is a driven gear, and the first transmission part 110 includes a plurality of first transmission teeth. When the driven gear is in the transmission position, the driven gear meshes with the plurality of first transmission teeth. Preferably, the drive source 220 is a motor.

[0066] Furthermore, the stapler also includes a frame 400, a housing 500 mounted on the frame 400, a cover plate 520 connected to the frame 400 or the housing 500, and a transmission member 100 slidably connected to the frame 400 in a direction parallel to a preset direction. In this embodiment, the preset direction refers to the retraction direction.

[0067] It should be noted that the opening corresponds to the retraction mechanism 320, and the cover plate 520 is used to cover the opening. When it is necessary to operate the retraction mechanism 320 to move the transmission member 100 along a preset direction, i.e., during retraction, the cover plate 520 needs to be opened relative to the opening so that the retraction mechanism 320 can communicate with the outside world through the opening for operation or observation. In this application, when the cover plate 520 is operated to open relative to the opening, the action of opening the cover plate 520 drives the unlocking member 310 to move from the first position to the second position, thereby switching the linkage member 210 from the transmission position to the disengagement position.

[0068] See Figure 1 , Figure 3 and Figure 4 , Figure 3 This is a front view of the linkage component in the transmission position in an anastomosis device according to an embodiment of the present invention; Figure 4 This is a first front view of the anastomosis device provided in an embodiment of the present invention, showing the linkage in the disengaged position. In one embodiment, the cover plate 520 is rotatable relative to the housing 500, and the unlocking mechanism 300 further includes a connector. The cover plate 520 is pulsatorically connected to the unlocking member 310 via the connector. When the cover plate 520 is configured to rotate relative to the housing 500 to open relative to the opening, the unlocking member 310 is pulsatorically controlled to move from a first position to a second position via the connector.

[0069] Specifically, the cover plate 520 is rotatably connected to the housing 500 or the frame 400. When the cover plate 520 rotates relative to the housing 500 to open or close the opening, it can drive the unlocking member 310 to rotate via the connecting member, causing the unlocking member 310 to move between a first position and a second position, thereby driving the linkage member 210 to switch between a transmission position and a disengagement position. The connecting member allows for a certain distance between the rotation axis of the cover plate 520 and the rotation axis of the unlocking member 310, increasing design freedom for both components and facilitating spatial layout. This allows the unlocking member 310 to be positioned on the side corresponding to the opening, enabling observation of its movement and accurate judgment of its movement from the first position to the second position.

[0070] It should be noted that when the cover plate 520 in this application rotates relative to the housing 500 to close relative to the opening, it can drive the unlocking member 310 to rotate through the connecting member, so that the unlocking member 310 moves from the second position to the first position, thereby driving the linkage member 210 to switch from the disengaged position to the transmission position, so that the linkage member 210 drives the transmission member 100 to move for operation. That is, the opening action of the cover plate 520 relative to the housing 500 does not necessarily require a retraction operation, and can also be used to observe the internal structure of the stapler through the opening.

[0071] In other embodiments, the cover plate 520 may be made of a transparent material, so that the internal structure of the stapler can be observed without opening the cover plate 520.

[0072] See Figure 1 and Figure 5 , Figure 5 This is a front view of the anastomosis device provided in one embodiment of the present invention, showing the cover plate and the unlocking member's rotation axis coinciding. In another embodiment, the unlocking member 310 can be directly connected to the cover plate 520, that is, the unlocking member 310 and the cover plate 520 are coaxially connected, or the unlocking member 310 and the cover plate 520 are integrally formed.

[0073] When the cover plate 520 rotates relative to the housing 500 to open relative to the opening, the cover plate 520 can drive the unlocking member 310 to rotate synchronously, so that the unlocking member 310 moves from the first position to the second position.

[0074] See Figure 1 , Figure 6 and Figure 7 , Figure 6 This is a second front view of the anastomosis device provided in an embodiment of the present invention, showing the linkage in the disengaged position; Figure 7This is a simplified diagram illustrating the cooperation between the cover plate, connecting rod, and unlocking element in a stapler according to an embodiment of the present invention. In one embodiment, the connecting element is a connecting rod 330, one end of which is rotatably connected to the unlocking element 310, and the other end is rotatably connected to the cover plate 520. The rotation axis of the cover plate 520 relative to the housing 500 does not coincide with the rotation axis of the unlocking element 310 relative to the connecting rod 330.

[0075] Specifically, the rotation axis of the cover plate 520 relative to the housing 500 is not coincident with the rotation axis of the unlocking member 310 relative to the connecting rod 330. This allows the rotation axis of the cover plate 520 and the rotation axis of the unlocking member 310 to have a gap in a preset direction. Thus, without increasing the volume of the stapler, the thickness of the unlocking member 310 and the size of the connection end between the cover plate 520 and the housing 500 or the frame 400 are not limited. This increases the fit strength between the cover plate 520 and the housing 500 or the frame 400 and improves the reliability of the stapler.

[0076] Furthermore, the rotation axis of the cover plate 520 relative to the housing 500 and the rotation axis of the unlocking member 310 relative to the connecting rod 330 are spaced apart in a preset direction. Since the transmission member 100 can move relative to the housing 500 in a preset direction, that is, the stapler has sufficient size in the preset direction, the spaced arrangement of the rotation axis of the cover plate 520 and the rotation axis of the unlocking member 310 in the preset direction will not affect the volume of the stapler.

[0077] In other embodiments, the connector may also be a gear.

[0078] See Figure 6 and Figure 7 In one embodiment, the unlocking member 310 is rotatably connected to the housing 500 or the frame 400, the rotation axis of the connecting rod 330 relative to the cover plate 520 is not coaxial with the rotation axis of the cover plate 520 relative to the housing 500, and the rotation axis of the connecting rod 330 relative to the unlocking member 310 is not coaxial with the rotation axis of the unlocking member 310.

[0079] Specifically, for ease of description, the rotation axis of the cover plate 520 relative to the housing 500 or the frame 400 is defined as the first rotation axis 521, the rotation axis of the connecting rod 330 relative to the cover plate 520 is defined as the third rotation axis 522, and the rotation axis of the connecting rod 330 relative to the unlocking member 310 is defined as the fourth rotation axis 331. The third rotation axis 522 is not coaxial with the first rotation axis 521, and the fourth rotation axis 331 is not coaxial with the second rotation axis 311. This makes the cover plate 520, the connecting rod 330, and the unlocking member 310 form a quadrilateral mechanism. That is, by rotating the cover plate 520 relative to the housing 500, the connecting rod 330 can be linked to achieve the transmission of the unlocking member 310.

[0080] It should be noted that on a first plane perpendicular to the first rotation axis 521, the first rotation axis 521 and the third rotation axis 522 are connected to obtain a first connecting line 530; the third rotation axis 522 and the fourth rotation axis 331 are connected to obtain a second connecting line 540; the fourth rotation axis 331 and the second rotation axis 311 are connected to obtain a third connecting line 550; and the first rotation axis 521 and the second rotation axis 311 are connected to obtain a fourth connecting line 560. The first connecting line 530, the second connecting line 540, the third connecting line 550 and the fourth connecting line 560 are arranged to form a quadrilateral, thus forming a quadrilateral mechanism to achieve linkage.

[0081] When the cover plate 520 rotates relative to the housing 500, the cover plate 520 forms a lever with its fulcrum falling on the first rotation axis 521. Since the length of the first connecting line 530 is less than the length of the cover plate 520, the cover plate 520 becomes a force-saving lever, achieving a force-saving effect. This allows the cover plate 520 to be driven to rotate more conveniently, thereby improving the efficiency of the linkage 210 in switching from the transmission position to the disengagement position.

[0082] In another embodiment, the unlocking member 310 is slidably connected to the housing 500 or the frame 400. The unlocking member 310, the cover plate 520 and the connecting rod 330 constitute a crank-slider mechanism. That is, by rotating the cover plate 520 relative to the housing 500, the connecting rod 330 can be driven to rotate, thereby pushing the unlocking member 310 to move from the first position to the second position.

[0083] See Figure 1 , Figure 6 and Figure 8 , Figure 8 This is a simplified diagram illustrating the cooperation between the cover plate and the unlocking mechanism in a stapler according to another embodiment of the present invention. In another embodiment, the cover plate 520 is rotatable relative to the housing 500. One of the unlocking member 310 and the cover plate 520 is provided with a protrusion 312, and the other is provided with a groove 523. The protrusion 312 is accommodated in the groove 523 and is slidable relative to the groove 523. When the cover plate 520 is configured to rotate relative to the housing 500 to open relative to the opening, the unlocking member 310 is controlled to move from a first position to a second position.

[0084] Specifically, the cover plate 520 is provided with a sliding groove 523, and the unlocking member 310 is provided with a protrusion 312. The protrusion 312 is slidably connected to the groove wall of the sliding groove 523, so that the cover plate 520 and the unlocking member 310 form a crank-slider mechanism. Thus, when the cover plate 520 rotates relative to the housing 500, it can drive the unlocking member 310 to rotate through linkage.

[0085] It should be noted that in other embodiments, the cover plate 520 and the unlocking member 310 can also form a crank-rocker mechanism, a double slider four-bar mechanism, etc., as long as the rotation axis of the cover plate 520 and the rotation axis of the unlocking member 310 are not coaxial, and the cover plate 520 can drive the unlocking member 310 to rotate when it rotates relative to the housing 500.

[0086] See Figure 1 , Figure 6 and Figure 8 In one embodiment, the unlocking member 310 is a cam or a slider. Specifically, when the unlocking member 310 is a cam, its outer contour edge abuts against the linkage member 210. When the cover plate 520 rotates relative to the housing 500 to switch the unlocking member 310 from the first position to the second position, the unlocking member 310 can push the linkage member 210 to move away from the second rotation axis, thereby disengaging the linkage member 210 from the first transmission part 110 to switch to the disengaged position. When the unlocking member 310 is a slider, the linkage member 210 is located in the direction of movement of the unlocking member 310. When the cover plate 520 rotates relative to the housing 500 to switch the unlocking member 310 from the first position to the second position, the unlocking member 310 pushes the linkage member 210 to disengage the linkage member 210 from the first transmission part 110 to switch to the disengaged position.

[0087] See Figure 1 and Figure 6 In one embodiment, when the linkage 210 is in the disengaged position, the cam experiences zero torque to lock the position of the linkage 210, thereby improving the reliability of the stapler.

[0088] See Figure 1 , Figure 3 and Figure 4 In one embodiment, the drive assembly 200 further includes an elastic element 240 for applying a thrust to the linkage 210 to drive the linkage 210 to reset.

[0089] Specifically, the drive assembly 200 further includes a rotating shaft 250 connected to the frame 400. A linkage 210 is sleeved on the rotating shaft 250, and an elastic element 240 is sleeved on the rotating shaft 250, with one end connected to the frame 400 and the other end abutting against the linkage 210. When the linkage 210 is in the transmission position, the elastic element 240 can apply a pushing force to the linkage 210, ensuring the linkage 210 remains stably in its current position for stable engagement with the first transmission part 110. When the linkage 210 switches from the transmission position to the disengagement position, the elastic element 240 can compress, providing the linkage 210 with axial movement space along the rotating shaft 250. Simultaneously, it provides a restoring force to the linkage 210, so that when the unlocking member 310 moves from the second position to the first position to release the linkage 210, the linkage 210 can return to its original position under the action of the elastic element 240. Preferably, the elastic element 240 is a spring.

[0090] See Figure 1 , Figure 4 , Figure 6 , Figure 9 and Figure 10 , Figure 9 A schematic diagram of the unlocking element in a stapler according to another embodiment of the present invention; Figure 10 This is a schematic diagram illustrating the engagement of an unlocking component and a linkage component in a stapler according to another embodiment of the present invention. In another embodiment, the unlocking component 310 is a drive wheel, and the circumferential wall of the drive wheel is provided with a mounting groove 340. The mounting groove 340 includes a first groove segment 341 and a second groove segment 342 extending circumferentially along the drive wheel. The distances of the first groove segment 341 and the second groove segment 342 relative to an axial end face of the drive wheel are not equal. The drive assembly 200 also includes a rotating shaft 250 passing through the linkage component 210. The rotating shaft 250 passes through the mounting groove 340 and is slidably connected to the mounting groove 340. When the unlocking component 310 moves between a first position and a second position, the rotating shaft 250 moves within the first groove segment 341 and the second groove segment 342 to drive the linkage component 210 to move axially along the drive wheel, thereby switching the linkage component 210 between a transmission position and a disengagement position.

[0091] Specifically, when the unlocking member 310 is in the first position, the rotating shaft 250 corresponds to the first groove segment 341; when the unlocking member 310 is in the second position, the rotating shaft 250 corresponds to the second groove segment 342. The first groove segment 341 is located on the side closer to the transmission member 100 relative to the second groove segment 342. When the unlocking member 310 moves from the first position to the second position, the rotating shaft 250 moves from the first groove segment 341 to the second groove segment 342, thereby causing the unlocking member 310 to move away from the transmission member 100, so that the linkage member 210 disengages from the first transmission part 110, and switches to the disengaged position. Preferably, the axial direction of the rotating shaft 250 is perpendicular to a preset direction.

[0092] See Figure 9 and Figure 10 In one embodiment, the first groove segment 341 and the second groove segment 342 extend in parallel and are offset in the axial direction of the unlocking member 310, and the first groove segment 341 and the second groove segment 342 are transitioned by an arc segment.

[0093] In another embodiment, the first groove segment 341 is connected to the second groove segment 342, and further, the mounting groove 340 is an inclined groove.

[0094] See Figure 1 , Figure 11 and Figure 12 , Figure 11 This is a second internal schematic diagram of a stapler provided in an embodiment of the present invention; Figure 12 This is a third internal schematic diagram of a stapler provided in one embodiment of the present invention. In one embodiment, the retraction mechanism 320 includes a pawl 322 and a trigger 321. The trigger 321 is rotatable relative to the housing 500. The pawl 322 is mounted on the trigger 321 and is operably in contact with the second transmission part 120. The trigger 321 drives the pawl 322 to drive the transmission member 100 to move in a preset direction.

[0095] Specifically, the second transmission unit 120 includes a plurality of second transmission teeth, and the pawl 322 is used to engage with the plurality of second transmission teeth. When the linkage 210 is switched to the disengaged position, the pawl 322 can be made to abut against the plurality of second transmission teeth by operating the trigger 321, so that when the trigger 321 is rotated, the pawl 322 can be driven to move the transmission unit 100 along a preset direction.

[0096] See Figure 1 , Figure 5 and Figure 13 , Figure 13 This is a schematic diagram showing the overlapping rotation axes of the cover plate, unlocking element, and trigger in a stapler according to an embodiment of the present invention. In one embodiment, the rotation axis of the trigger 321 is coaxially fixed with the rotation axis of the unlocking element 310, thereby simplifying the structure. When the rotation axis of the unlocking element 310 is not coaxial with the rotation axis of the cover plate 520, there is a gap between the first rotation axis 521 of the cover plate 520 and the second rotation axis 311 of the unlocking element 310, which increases the movement space of the trigger 321, allowing for a larger reciprocating range of the trigger 321 and improving the retraction efficiency of the stapler. When the rotation axis of the unlocking element 310 is coaxial with the rotation axis of the cover plate 520, the rotation axes of the unlocking element 310, the cover plate 520, and the trigger 321 are coaxially fixed, further simplifying the structure.

[0097] In other embodiments, the rotation axis of the trigger 321 and the rotation axis of the unlocking member 310 may also be non-axial.

[0098] See Figure 1 , Figure 11 , Figure 12 , Figure 14 and Figure 15 , Figure 14 This is a partial cross-sectional view of the pawl and the second transmission part in a stapler provided according to an embodiment of the present invention; Figure 15 This is a schematic diagram of a pawl in a stapler according to an embodiment of the present invention. In one embodiment, the pawl 322 includes a base 323, an overlapping block 324, and a claw tip 326. The base 323 is rotatably connected to a trigger 321. The claw tip 326 is disposed on the side of the base 323 facing the transmission member 100 and is used to engage with a plurality of second transmission teeth. The overlapping block 324 is disposed on the base 323. A limiting platform 325 protrudes from the frame 400 to support the overlapping block 324. The claw tip 326 has an initial position. When the claw tip 326 is in the initial position, the lap block 324 laps onto the limiting platform 325, and there is a gap between the claw tip 326 and the transmission member 100. When the claw tip 326 is in the mating position, the lap block 324 disengages from the limiting platform 325, and the claw tip 326 abuts against the second transmission tooth 120. By rotating the operating trigger 321, the pawl 322 can be driven to move the transmission member 100 in one direction, thereby driving the transmission member 100 to retract.

[0099] For details, please refer to the appendix to the manual. Figure 11 When the linkage 210 is in the transmission position, the claw tip 326 is in the initial position, thus preventing interference with the transmission component 100. (See appendix to the manual.) Figure 12 When the linkage 210 is in the disengaged position, turning the trigger 321 clockwise moves the pawl 322 to the left, causing the lap block 324 to slide out of the limiting platform 325 and land on the transmission member 100, where it abuts against the second transmission gear 120. (See appendix to the manual.) Figure 12 By continuing to turn the trigger 321 clockwise, the pawl 322 can be pushed to move to the left. When the trigger 321 is turned counterclockwise, since the pawl 322 controls the movement of the transmission component 100 in one direction, it will not interfere with the transmission component 100, thus preparing for the trigger 321 to turn clockwise again, so as to drive the transmission component 100 to retract.

[0100] See Figure 1 and Figure 16 , Figure 16This is a schematic diagram of a retraction mechanism in a stapler according to another embodiment of the present invention. In another embodiment, the retraction mechanism 320 includes a drive rod 350 and a drive gear 360. The drive rod 350 is rotatably connected to the housing 500 or the frame 400, and the drive gear 360 is threadedly connected to the drive rod 350. The drive gear 360 has a first engagement position and a second engagement position. By operating the drive rod 350 to rotate, the drive gear 360 can be driven to switch from the first engagement position to the second engagement position to mesh with the second transmission part 120, thereby driving the transmission member 100 to move in a preset direction.

[0101] Specifically, when the drive gear 360 is in the first position, there is a certain gap between the drive gear 360 and the transmission member 100, so that when the linkage member 210 is in the transmission position, it will not interfere with the movement of the transmission member 100 driven by the linkage member 210. When the operating drive rod 350 is rotated, the drive gear 360 can be driven to move axially along the drive rod 350 through threaded transmission, so that the drive gear 360 moves closer to the transmission member 100. When the drive gear 360 switches from the first position to the second position, the drive gear 360 meshes with the second transmission part 120, and the drive gear 360 moves to the end of the thread on the drive rod 350, so that the threaded transmission between the drive gear 360 and the drive rod 350 is interrupted. Then, when the operating drive rod 350 is rotated further, the drive gear 360 and the drive rod 350 can rotate synchronously, thereby driving the transmission member 100 to retract.

[0102] Furthermore, the retraction assembly also includes at least one guide rod, each guide rod being parallel to and spaced apart from the drive rod 350 in the housing 500 or the frame 400. The drive gear 360 is provided with at least one guide hole. When the drive gear 360 is in the first position, each guide rod can pass through the guide hole, thereby restricting the rotation of the drive gear 360 and making the drive gear 360 stably approach the transmission member 100 along the extension direction of the drive rod 350.

[0103] See Figure 1 and Figure 17 , Figure 17 This is a schematic diagram of the retraction mechanism in a stapler according to another embodiment of the present invention. In another embodiment, the retraction mechanism 320 includes a retraction wheel 370 and an adapter 380. The retraction wheel 370 is rotatably connected to the housing 500 or the frame 400. The adapter 380 is arranged around the outer periphery of the retraction wheel 370, and its two ends are respectively connected to the two ends of the transmission member 100. When the linkage member 210 is in the disengaged position, by operating the retraction wheel 370 to rotate around its own axis, the adapter 380 can be driven to move by friction, thereby driving the transmission member 100 to move, thus achieving retraction. Preferably, the adapter 380 is a pull rope.

[0104] See Figure 1 In one embodiment, the drive assembly 200 further includes a drive gear 230, which is connected to the power output end of the drive source 220. The drive gear 230 is used to mesh with the linkage 210 to realize the transmission connection between the drive source 220 and the linkage 210.

[0105] In addition to the above, in another embodiment, the present invention also provides a stapler.

[0106] See Figure 1 , Figure 18 and Figure 19 , Figure 18 This is a schematic diagram of the anastomosis device with the cover plate open relative to the housing, provided in another embodiment of the present invention. Figure 19 This is a partial schematic diagram of the internal structure of a stapler according to another embodiment of the present invention. The stapler includes a housing 500, an end effector 600 connected to the housing 500, and a transmission member 100, a drive assembly 200, an unlocking mechanism 300, and a retraction mechanism 320 disposed within the housing 500. The end effector 600 includes a movable cutting member 610 for cutting tissue. The transmission member 100 is movable relative to the housing 500 and is operably connected to the cutting member 610. The transmission member 100 includes a first transmission part 110 and a second transmission part 120. The drive assembly 200 includes a linkage member 210 and a drive source 220. The linkage member 210 has a transmission position and a disengagement position. When the linkage member 210 is in the transmission position, it is driveably connected to the first transmission part 110 and to the drive source 220. When the moving member 210 is in the disengaged position, the linkage member 210 is disengaged from the first transmission part 110; the unlocking mechanism 300 includes an unlocking drive member 313 and an unlocking member 310. The unlocking drive member can move relative to the housing 500, and the unlocking member 310 can move between a first position and a second position; the unlocking member 310 is driven to the cover plate 520, and the movement of the unlocking member 310 between the first position and the second position can be controlled by operating the unlocking drive member 313; the unlocking member 310 is driven to the linkage member 210, and when the unlocking member 310 moves from the first position to the second position, it drives the linkage member 210 to switch from the transmission position to the disengaged position; the retraction mechanism 320 is used to be operably driven to the second transmission part 120 to drive the transmission member 100 to move in a preset direction.

[0107] Specifically, in this application, the unlocking member 310 is connected to the unlocking drive member 313 via a transmission connection, so that when the unlocking drive member 313 is operated, the unlocking member 310 can be driven to move between the first position and the second position. The unlocking member 310 is also connected to the linkage member 210 via a transmission connection. When the unlocking member 310 moves from the first position to the second position, the linkage member 210 is driven to switch from the transmission position to the disengagement position. Then, by operating the retraction mechanism 320, the retraction mechanism 320 is connected to the second transmission part 120 via a transmission connection, which can drive the transmission member 100 to move along a preset direction, thereby realizing the convenient retraction of the stapler.

[0108] It should be noted that in this embodiment, the unlocking drive component 313 is connected to the unlocking component 310 via a transmission connection. That is, the unlocking drive component 313 can be a cover plate 520, or it can be other components independent of the cover plate, such as a swing arm that is rotatably connected to the frame 400 or the housing 500, or a button that is slidably connected to the frame 400 or the housing 500. The cover plate 520 only serves to cover the opening.

[0109] It should also be noted that the retraction mechanism 320 in this embodiment has the same structure as the retraction mechanism 320 in the above embodiments, so it will not be described again.

[0110] See Figure 5 , Figure 6 , Figure 7 and Figure 19 In one embodiment, the unlocking actuator can rotate or move relative to the housing, and the unlocking actuator includes a cam or a slider.

[0111] Specifically, by driving the unlocking member to rotate or move by the unlocking drive member 313, the linkage member 210 can be moved from the transmission position to the disengagement position. The specific transmission connection between the unlocking drive member 313 and the unlocking member 310 is the same as in the above embodiment, and will not be described again.

[0112] See Figure 1 , Figure 3 and Figure 4 In one embodiment, the drive assembly 200 further includes an elastic element 240 for applying a thrust to the linkage 210 to drive the linkage 210 to reset.

[0113] Specifically, the drive assembly 200 further includes a rotating shaft 250 connected to the frame 400. A linkage 210 is sleeved on the rotating shaft 250, and an elastic element 240 is sleeved on the rotating shaft 250, with one end connected to the frame 400 and the other end abutting against the linkage 210. When the linkage 210 is in the transmission position, the elastic element 240 can apply a pushing force to the linkage 210, ensuring the linkage 210 remains stably in its current position for stable engagement with the first transmission part 110. When the linkage 210 switches from the transmission position to the disengagement position, the elastic element 240 can compress, providing the linkage 210 with axial movement space along the rotating shaft 250. Simultaneously, it provides a restoring force to the linkage 210, so that when the unlocking member 310 moves from the second position to the first position to release the linkage 210, the linkage 210 can return to its original position under the action of the elastic element 240. Preferably, the elastic element 240 is a spring.

[0114] See Figure 1 , Figure 4 , Figure 6 , Figure 9 and Figure 10 , Figure 9 A schematic diagram of the unlocking element in a stapler according to another embodiment of the present invention; Figure 10 This is a schematic diagram illustrating the engagement of the unlocking component and the linkage component in a stapler according to another embodiment of the present invention. In yet another embodiment, the unlocking drive component 313 is rotatable relative to the housing 500. The unlocking component 310 is a drive wheel, and the circumferential wall of the drive wheel is provided with a mounting groove 340. The mounting groove 340 includes a first groove segment 341 and a second groove segment 342 extending circumferentially along the drive wheel. The distances of the first groove segment 341 and the second groove segment 342 relative to an axial end face of the drive wheel are not equal. The drive assembly 200 also includes a rotating shaft 250 passing through the linkage component 210. The rotating shaft 250 passes through the mounting groove 340 and is slidably connected to the mounting groove 340. When the unlocking component 310 moves between a first position and a second position, the rotating shaft 250 moves within the first groove segment 341 and the second groove segment 342 to drive the linkage component 210 to move axially along the drive wheel, thereby switching the linkage component 210 between a transmission position and a disengagement position. Specifically, in this embodiment, the specific transmission connection method between the unlocking drive component 313 and the unlocking component 310 is the same as in the above embodiment, and therefore will not be repeated.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A stapler, characterized in that, It includes a housing (500), an end effector (600) connected to the housing (500), and a transmission component (100), a drive assembly (200), an unlocking mechanism (300), and a retraction mechanism (320) disposed within the housing (500); The housing (500) is provided with an opening for operating the retraction mechanism (320) and a cover plate (520) that at least partially covers the opening; the end effector (600) includes a movable cutting member (610) for cutting tissue; the transmission member (100) is movable relative to the housing (500), the transmission member (100) is operably connected to the cutting member (610), and the transmission member (100) includes a first transmission part (110) and a second transmission part (120); The drive assembly (200) includes a linkage (210) and a drive source (220). The linkage (210) has a transmission position and a disengagement position. When the linkage (210) is in the transmission position, the linkage (210) is connected to the first transmission part (110) and to the drive source (220). When the linkage (210) is in the disengagement position, the linkage (210) is disengaged from the first transmission part (110). The unlocking mechanism (300) includes an unlocking member (310) that is movable between a first position and a second position. The unlocking member (310) is tractively connected to the cover plate (520), and the unlocking member (310) can be controlled to move between the first position and the second position by operating the cover plate (520). The unlocking member (310) is tractively connected to the linkage member (210), and when the unlocking member (310) moves from the first position to the second position, the linkage member (210) is driven to switch from the tractive position to the disengaged position. The retraction mechanism (320) is operably tractively connected to the second transmission part (120) to drive the transmission member (100) to move along a preset direction.

2. The stapler according to claim 1, characterized in that, The cover plate (520) is rotatable relative to the housing (500), and the unlocking mechanism (300) further includes a connecting member. The cover plate (520) is connected to the unlocking member (310) through the connecting member. When the cover plate (520) is configured to rotate relative to the housing (500) to open relative to the opening, the unlocking member (310) is controlled to move from the first position to the second position via the connector.

3. The stapler according to claim 2, characterized in that, The connecting member is a connecting rod (330), one end of which is rotatably connected to the unlocking member (310), and the other end is rotatably connected to the cover plate (520). The rotation axis of the cover plate (520) relative to the housing (500) does not coincide with the rotation axis of the unlocking member (310) relative to the connecting rod (330).

4. The stapler according to claim 1, characterized in that, The cover plate (520) is rotatable relative to the housing (500). One of the unlocking member (310) and the cover plate (520) is provided with a protrusion (312), and the other is provided with a groove (523). The protrusion (312) is accommodated in the groove (523) and is slidable relative to the groove (523). When the cover plate (520) is configured to rotate relative to the housing (500) to open relative to the opening, the unlocking member (310) is controlled to move between the first position and the second position.

5. The stapler according to any one of claims 1-4, characterized in that, The unlocking element (310) includes a cam or a slider.

6. The stapler according to claim 5, characterized in that, The drive assembly (200) further includes an elastic element (240) for applying a thrust to the linkage (210) to drive the linkage (210) to reset.

7. The stapler according to any one of claims 1-4, characterized in that, The unlocking component (310) is a drive wheel. The drive wheel has a mounting groove (340) on its circumferential wheel wall. The mounting groove (340) includes a first groove segment (341) and a second groove segment (342) extending circumferentially along the drive wheel. The distances between the first groove segment (341) and the second groove segment (342) and the axial end face of the drive wheel are not equal. The drive assembly (200) further includes a rotating shaft (250) passing through the linkage (210), the rotating shaft (250) passing through the mounting groove (340) and slidably connected to the mounting groove (340); When the drive wheel moves between the first position and the second position, the shaft (250) moves in the first groove (341) and the second groove (342), thereby driving the linkage (210) to move along the axial direction of the drive wheel, so as to switch the linkage (210) between the transmission position and the disengagement position.

8. The stapler according to any one of claims 1-4, characterized in that, The retraction mechanism (320) includes a pawl (322) and a trigger (321). The trigger (321) is rotatable relative to the housing (500). The pawl (322) is mounted on the trigger (321) and is operably in contact with the second transmission part (120). The trigger (321) drives the pawl (322) to drive the transmission member (100) to move in a preset direction.

9. The stapler according to any one of claims 1-4, characterized in that, The retraction mechanism (320) includes a drive rod (350) and a drive gear (360). The drive gear (360) is threadedly connected to the drive rod (350). The drive gear (360) has a first engagement position and a second engagement position. By operating the drive rod (350) to rotate around its own axis, the drive gear (360) can be driven to switch from the first engagement position to the second engagement position, so that the drive gear (360) meshes with the second transmission part (120) to drive the transmission member (100) to move along a preset direction.

10. The stapler according to any one of claims 1-4, characterized in that, The retraction mechanism (320) includes a retraction wheel (370) and a converter (380). The converter (380) is arranged around the outer periphery of the retraction wheel (370), and the two ends of the converter (380) are respectively connected to the two ends of the transmission member (100). By operating the retraction wheel (370) to rotate around its own axis, the converter (380) can be driven to drive the transmission member (100) to move in a preset direction.

11. A stapler, characterized in that, It includes a housing (500), an end effector (600) connected to the housing (500), and a transmission component (100), a drive assembly (200), an unlocking mechanism (300), and a retraction mechanism (320) disposed within the housing (500); The end effector (600) includes a movable cutting member (610) for cutting tissue; the transmission member (100) is movable relative to the housing (500), the transmission member (100) is operatively connected to the cutting member (610), and the transmission member (100) includes a first transmission part (110) and a second transmission part. The drive assembly (200) includes a linkage (210) and a drive source (220). The linkage (210) has a transmission position and a disengagement position. When the linkage (210) is in the transmission position, the linkage (210) is connected to the first transmission part (110) and to the drive source (220). When the linkage (210) is in the disengagement position, the linkage (210) is disengaged from the first transmission part (110). The unlocking mechanism (300) includes an unlocking drive (313) and an unlocking member (310). The unlocking drive (313) is movable relative to the housing (500), and the unlocking member (310) is movable between a first position and a second position. The unlocking member (310) is connected to the unlocking drive (313) in a transmission manner. By operating the unlocking drive (313), the unlocking member (310) can be controlled to move between the first position and the second position. The unlocking member (310) is connected to the linkage member (210) in a transmission manner. When the unlocking member (310) moves from the first position to the second position, the linkage member (210) is driven to switch from the transmission position to the disengagement position. The retraction mechanism (320) is used to be operably connected to the second transmission part (120) to drive the transmission member (100) to move along a preset direction.

12. The stapler according to claim 11, characterized in that, The unlocking drive (313) is rotatable or movable relative to the housing (500), and the unlocking element (310) includes a cam or a slider.

13. The stapler according to claim 12, characterized in that, The drive assembly (200) further includes an elastic element (240) for applying a thrust to the linkage (210) to drive the linkage (210) to reset.

14. The stapler according to any one of claims 11-13, characterized in that, The unlocking drive (313) is rotatable relative to the housing (500). The unlocking component (310) is a drive wheel. The circumferential wall of the drive wheel is provided with a mounting groove (340). The mounting groove (340) includes a first groove segment (341) and a second groove segment (342) extending circumferentially along the drive wheel. The distances of the first groove segment (341) and the second groove segment (342) relative to the axial end face of the drive wheel are not equal. The drive assembly (200) further includes a rotating shaft (250) passing through the linkage (210), the rotating shaft (250) passing through the mounting groove (340) and slidably connected to the mounting groove (340); When the drive wheel moves between the first position and the second position, the shaft (250) moves in the first groove (341) and the second groove (342), thereby driving the linkage (210) to move along the axial direction of the drive wheel, so as to switch the linkage (210) between the transmission position and the disengagement position.

15. The stapler according to any one of claims 11-13, characterized in that, The retraction mechanism (320) includes a pawl (322) and a trigger (321). The trigger (321) is rotatable relative to the housing (500). The pawl (322) is mounted on the trigger (321) and is operably in contact with the second transmission part (120). The trigger (321) drives the pawl (322) to drive the transmission member (100) to move in a preset direction.

16. The stapler according to any one of claims 11-13, characterized in that, The retraction mechanism (320) includes a drive rod (350) and a drive gear (360). The drive gear (360) is threadedly connected to the drive rod (350). The drive gear (360) has a first engagement position and a second engagement position. By operating the drive rod (350) to rotate around its own axis, the drive gear (360) can be driven to switch from the first engagement position to the second engagement position, so that the drive gear (360) meshes with the second transmission part (120) to drive the transmission member (100) to move along a preset direction.

17. The stapler according to any one of claims 11-13, characterized in that, The retraction mechanism (320) includes a retraction wheel (370) and a converter (380). The converter (380) is arranged around the outer periphery of the retraction wheel (370), and the two ends of the converter (380) are respectively connected to the two ends of the transmission member (100). By operating the retraction wheel (370) to rotate around its own axis, the converter (380) can be driven to drive the transmission member (100) to move in a preset direction.

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